Contents

Revision and Copyright Information
Warranty and Assitance
Table of Contents
Section 1. Introduction
- 1.1 Typical Application
Section 2. Specifications
Section 3. Sensor Alignment and Installation
- 3.1 Alignment
- 3.2 Installation
- 3.3 Adjusting Excessive Transducer Offset
Section 4. Wiring
- 4.1 Initial Check-Out
- 4.2 Excitation Voltage
Section 5. Mounting of Sensor to Various Surfaces
- 5.1 General
- 5.2 Mounting Information for Different Types of Surfaces
  - 5.2.1 Steel
  - 5.2.2 Reinforced Concrete
  - 5.2.3 Pre-stressed Concrete
  - 5.2.4 Timber
Section 6. Calibration and Validation
Section 7. Maintenance, Replacement Parts, and Repairs
- 7.1 Maintenance
- 7.2 Replacement Parts
Section 8. Datalogger Programming
- 8.1 CR1000 Example
- 8.2 CR5000 Example
Appendix A. Special Instructions for using ST350
- A.1 Instructions for Using ST350 Strain Transducer Extensions on Reinforced Concrete Structures
- A.2 Attaching the Concrete Extension to a Strain Transducer
Appendix B. ST350 Accuracy Verification
- B.1 Verifying the Accuracy of ST350 Strain Transducers
  - B.1.1 Introduction
  - B.1.2 Background
  - B.1.3 Factory Calibrations
  - B.1.4 Temperature Effects
  - B.1.5 Specimen Type and Size
  - B.1.6 Items for Consideration
  - B.1.7 Other Considerations
Appendix C. Calibration Sheets
- C.1 Example of Calibration Sheet BDI Supplied
- C.2 Example of Calibration Sheet CSI Supplied
Index
Campbell Scientific Contact Information

Campbell Scientific ST350 Instruction Manual

Campbell Scientific ST350 Transducer manual cover

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Campbell Scientific ST350 Transducer Specification

The Campbell Scientific ST350 Transducer is a precision instrument designed for accurate measurement of pressure in a variety of environmental and industrial applications. This robust device is engineered to deliver reliable performance in challenging conditions, featuring a stainless steel construction that resists corrosion and ensures longevity. The ST350 operates within a pressure range of 0 to 350 psi, providing high-resolution data critical for detailed analysis. It utilizes a piezoresistive sensor that offers excellent linearity and repeatability, with an accuracy of ±0.1% full scale at room temperature, ensuring precise readings.

The transducer supports a wide operating temperature range from -40°C to 85°C, making it suitable for diverse climatic conditions. It requires a supply voltage between 9 and 28 VDC, enabling compatibility with various power sources. The ST350 outputs a 4-20 mA signal, which is industry-standard for pressure transducers, allowing seamless integration with data loggers, controllers, and monitoring systems. Its compact design facilitates easy installation in confined spaces, while the integral cable, available in lengths up to 50 meters, enhances flexibility in deployment.

The ST350 is designed to meet rigorous environmental standards and is IP68 rated, ensuring it is dust-tight and capable of enduring continuous submersion in water. This makes the transducer ideal for applications in hydrology, meteorology, and industrial process control, where it can be utilized for monitoring groundwater, surface water, or atmospheric pressure. Campbell Scientific backs the ST350 with comprehensive technical support and service options, ensuring users can maintain optimal functionality throughout the device's lifecycle.

Campbell Scientific ST350 Transducer F.A.Q.

What are the initial setup steps for the Campbell Scientific ST350 Transducer?

Begin by mounting the ST350 transducer securely in the desired location. Connect the power supply, ensuring that the voltage and current requirements are met. Next, interface the transducer with your data acquisition system using the appropriate communication protocol. Finally, perform a calibration check to ensure accurate readings.

How do I calibrate the Campbell Scientific ST350 Transducer?

To calibrate the ST350, reference the calibration procedure outlined in the user manual. Connect the transducer to a known reference pressure, and adjust the calibration settings within the data acquisition software to match the reference. Ensure the transducer's output is linear and consistent across the range of expected measurements.

What should I do if the ST350 Transducer is not providing accurate readings?

First, check all connections and ensure that the power supply is stable. Verify that the transducer is properly calibrated. Inspect the transducer for any signs of physical damage or contamination. If issues persist, consult the troubleshooting section of the user manual or contact technical support for further assistance.

How can I integrate the ST350 Transducer with a data logging system?

Connect the ST350 Transducer to your data logger using the appropriate communication interface, such as RS-232 or SDI-12. Configure the data logger to recognize the transducer and set up the logging parameters according to your measurement needs. Refer to the documentation for both devices for specific integration instructions.

What maintenance is required for the Campbell Scientific ST350 Transducer?

Regularly inspect the transducer for physical damage or contamination. Clean the sensor with a soft, damp cloth if necessary, avoiding any harsh chemicals. Ensure that all connections are secure and free from corrosion. Periodically check calibration and recalibrate as needed. Follow any additional maintenance recommendations in the user manual.

What environmental conditions can the ST350 Transducer operate in?

The ST350 Transducer is designed to operate in a variety of environmental conditions. It is typically rated for temperatures ranging from -40°C to 85°C and can withstand humidity levels up to 95% non-condensing. Always refer to the specific environmental specifications in the user manual for accurate information.

How do I troubleshoot communication issues with the ST350 Transducer?

Ensure that all communication cables are properly connected and undamaged. Verify that the transducer and data acquisition system are configured to use the same communication protocol. Check for any software updates or patches that might resolve known issues. Refer to the troubleshooting guide in the manual for detailed steps.

What are the common error codes for the ST350 Transducer and their meanings?

Common error codes include E01 for communication failure, E02 for calibration error, and E03 for sensor malfunction. Each code indicates a specific issue that needs addressing. Refer to the user manual for a comprehensive list of error codes and recommended actions.

Can the ST350 Transducer be used for underwater applications?

The ST350 Transducer is not designed for direct underwater use unless specified otherwise in its specifications. If underwater measurements are required, use a protective housing or select a model specifically rated for submersion.

How do I update the firmware on the ST350 Transducer?

Check the Campbell Scientific website for any available firmware updates. Download the update to your computer and follow the instructions provided to transfer the firmware to the transducer. This usually involves connecting the transducer to a computer via a USB or serial interface.